The best test of whether potential entry is a strong or weak competitive force is Select one: a. to ask if the industry's growth and profit prospects are strongly attractive to potential entry candidates b. whether the industry's driving forces make it harder or easier for new entrants to be successful. c. whether there are any vacant spaces on the industry's strategic group map d. whether the strategies of industry members are well-matched to the industry's key success factors. e. the strength of buyer loyalty to existing brands.